Help with Titration lab needed

In summary, a solution of 14.05 mL of NaOH is mixed with 50.0 mL of 0.2102 M H2SO4 and titrated with 10.55 mL of 0.08883 M KOH until the equivalence point is reached. The original concentration of NaOH can be calculated by accounting for the moles of base needed for the neutralization.
  • #1

Homework Statement


A sol;n of 14.05 mL of NaOH is mixed with 50.0 mL of 0.2102 M H2SO4 (standardized) and allowed to react. The sol'n (H2SO4 and NaOH) is still acidic, so it is titrated with 10.55mL of standardized KOH (0.08883M) until the equilivance point is reached. What was the original concentration (molarity) of NaOH.


Homework Equations


I have converted H2SO4 to moles.
.2102 mol/L * .0500L = 0.01051 moles H2SO4

0.08883 mol/L KOH * 0.01055L = 0.0009372 mol KOH


The Attempt at a Solution


I am not sure how to link the 3 together
 
Physics news on Phys.org
  • #2
Show us the reaction you are using for the neutralizations.

Basically (not jokingly), you are using two different bases to neutralize the sulfuric acid. Some moles of base are from KOH, and some unknown but calculable moles are from NaOH. HOW MANY BASE MOLES ARE NEEDED FOR THE NEUTRALIZATION? THis becomes just accounting.
 
  • #3
.

I am happy to assist you with your titration lab. Based on the information provided, we can use the equation M1V1 = M2V2 to find the original concentration of NaOH. M1 and V1 represent the initial concentration and volume of NaOH, while M2 and V2 represent the final concentration and volume of NaOH at the equivalence point.

Using this equation, we can set up the following calculation:

M1 * 14.05 mL = 0.08883 mol/L * 10.55 mL

Solving for M1, we get:

M1 = (0.08883 mol/L * 10.55 mL)/14.05 mL = 0.0665 mol/L

Therefore, the original concentration of NaOH was 0.0665 mol/L. I hope this helps with your titration lab. Remember to always double check your calculations and units to ensure accuracy. Good luck!
 

1. What is a titration lab?

A titration lab is a laboratory experiment commonly used in chemistry to determine the concentration of a substance in a solution. It involves adding a known amount of a reagent (called titrant) to a solution containing the substance of interest until a desired reaction occurs, which can be visually or instrumentally detected.

2. Why is a titration lab important?

A titration lab is important because it allows for the accurate determination of the concentration of a substance in a solution. This information is crucial in various fields such as pharmaceuticals, environmental studies, and food and beverage industries.

3. What materials are needed for a titration lab?

The materials needed for a titration lab include a burette, a burette stand, a flask or beaker, a pipette, a stirrer, an indicator, the titrant solution, and the solution being analyzed.

4. What are the steps involved in a titration lab?

The steps involved in a titration lab generally include preparing the solutions, setting up the equipment, adding the titrant to the solution being analyzed, recording the volume of titrant used, and repeating the process until consistent results are obtained. The endpoint of the titration can be determined by using an indicator or through instrumental methods.

5. What are some common sources of error in a titration lab?

Some common sources of error in a titration lab include inaccurate measurements of solutions, improper calibration of equipment, human error in reading burette volumes, and incorrect use of indicators. It is important to carefully follow the procedure and use precise measurements to minimize these errors.

Suggested for: Help with Titration lab needed

Replies
7
Views
1K
Replies
1
Views
1K
Replies
3
Views
757
Replies
5
Views
574
Replies
2
Views
2K
Replies
1
Views
2K
Replies
2
Views
1K
Replies
12
Views
2K
Replies
1
Views
1K
Back
Top